Blast-furnace-cooling device.



APPLICATION IILBDJNE l5. 1912; f

Patented 9ct. 29, 1912.

2 SHEETS-SHEET 1.

`P.D.GARNBY.

BLAST PUHNAGE COOLING DEVICE.v

APPLICATION FILED JUNE 15, 1912.

Patented Oct, 29, 191.@

2 SHEETS"SHBET 2.

FRANK CARNEY, OF STEELTON, PENNSYLVANIA.

lBLAS'.l-FURJSTACE-CJOOLING DEVICE.

Application tiled June 15, 1912. Serial No. 703,909.

` To all whom 'it may concern:

Be it known that I, FRANK D. CARNE f, a citizen of the United States of America, residing at Steelton, Dauphin county, Pennsylvania, United. States of America, have-iin vented certain new and useful Improvements in` Blast-Furnace-Cooling Devices; and I do hereby declare the follow-ing to be a full, cleai, and exactI description of the invention, such as will enable others skilled in the art to which it appertains to nl ake and use the same, reference being had to the f accompanying drawings, and to' letters or vfigures of reference marked thereon, which form a part of this specification.

My invention relatesto blast furnace construction, and more particularly toa structure permitting the walls of the furnace to be maintained cool during its operation, thereby enabling a reduction of the thickness of the lining, decreasing the wear on` the lining, facilitating the re-lining of the furnace, and generally prolonging the life of the furnace. This I do by using hollow cooling staves extending substantially the length of the furnace and supported on the mantle. These staves are spaced apart, and the intervals filled with the customary iii-e brick, while outside of the brick the st-aves are connected to one another by shell plates, which, together with the staves form the shell of the furnace. In addition the staves are each provided outside the furnace with circulating' and cooling pipes, as will hereinafter be explained in detail.

Referring to the drawings in which like parts are similarly designated-Figure 1 is a vertical sectional view of' a portion of a, blast furnace showing my invention appliedthereto. F ig. 2 is a detail View, partly section, of the mantle and' lower part of a stave. Fig. 3 is a horizontal section on an enlarged scale showing the staves and Sections of the furnace shell alternating. Figs. 4l, 5 andl are, respectively, fragment-ary lvertical alud horizontal sections and front elevation of a modified form of radiator ar rangement. F 7 is a section showing a modified forni of shell. i

Referring to Fig. l, F represents a blast furnace whose walls are composed of long hollow, water-cooled staves S alternating with fire.,` brick lining L, (Fig. 3). The stares are connected with one another by furnace shell plates l, which, together with adjacent stares support the fire brick.

Specification of Letters Patent.

,at the rolling mill.

patented oct. 29,1912.

on the mantle M of the furnace. The stavs are made of long plates 2, bent substantially U-shap'ed in section, the bending being done preferably after the final rolling operation These plates are 50-60 feet long, more or less, depending upon the height of t-he furnace. Their ends are turned up to form top and bottoni flanges 3 and 4. Across the trough are riveted channels 5, also having top and bottom flanges 6 and 7 respectively. Between the ends of the top and bottom flanges 3 and 4 are placed filling pieces 8 and 9, respectively, which are of the same thickness as said flanges and against which lie the top and bottom anges 6 and 7 of the channels. The stave is then closed by end plates 10 and 11 to form a water-tight compartment by riveting the parts together. The bottom end plate 11 is provided with a drainage hole closed by a screw plug 12, access-to which plug is gained through an inspection opening 13 in the mantle M. In the lower part of each stave in the channel member 5 is provided a covered hand-hole 14 for removing scale andl most one, has an extension 19 to a greater or less extent above the upper manifold pipe and is left open. Each manifold pipe is provided with a cut-off valve, 20, 21, respectively, located adjacent the channel member 5, ,that isY to say, between the point-of connection of the innermost pipe 18 with the manifold and its channel member. Surrounding the furnace, preferably slightly above the mantle, is a bustle water supply pipe 22. This pipe is connected by short supply pipes 23 to the lower manifold l5 for each stave.A The pipe 23 contains a valve, 24, and a short pipe 25 of smaller diameter than the manifold projects a short distance into the same and acts as an injector. The pipe 23 may be of the same size as the pipe 25, as shown at23a, Fig. 2. Conf acted to the upper manifold is a pipe Q6 remaining a valve and terminating in a spray pipe :o: substantially parallel to the 'tace of the channel .3. lt` vwill be noted that the channelso forming the backs of the water starrs are. .set ,torwart'l toward the interior oi' the terrace with respect to the rbanutl` t forming the intermediate shell sections. 'This facilitates the riveting of the channels l to the stares, as in this case the rivets flo not have to pass through thetlangcs: el' tbc channels 5.

ln Figs. lnl 1 have shown the pipes 1S and manifolds as .located in a plane substan tially radial of the furnace.

ln Figs. lY-( l have shown the manifolds lo and l?" and the pipes 1S substantially parallel to the channel 5, or in a vertical plane alJ right angles to the plane in which the .similar elena-nts are located in Pigs. l- 'l`he manifolds are connected to the stares by pipes 26 and 27. In these figures .l have shown the plate from which the trough F2 is made thiclter at 2 that portion being directly exposed to the descending charge in the furnace.

in Fig. 7 l have shown a stave of moditied cross section, the trough 2 being bent inwardly at 28, thus using a narrower channel Si. The trough member 2 is then bent outwardly to form diverging [langes 2t), by which the staves are connected to converging flanges 30 of the shell mel'nbers l. This form of section produces'a better interlock with the masonry,

The operation is as follows: The spray pipe valve 2T of a stave being closed all other valves to a stava are opened and the stave and pipes tilled with water from the bustle water pipe 22 until it flows out of the overtiow 15). The heat being greatest al, the lower part of the stave the hot water rises, passes along the upper manifold 17, down the pipes 18 to the lower manifold where the circulation is accelerated by the injector action of pipe 25, the excess of water spilling over the end of pipe if). It will thus be seen that the two manifolds and their intermediate pipes form a radiator for dissipating the heattaken up by the water while in the stave. lt is of course understood that the speed of circulation may be increased by loading the circulating system, either by means of an additional hydraulic l1 lad by 'tending the pipe 1 9 several feet above the upper manifold, or by a loading valve. The water spilling over the end of pipe if) passes over the pipe on the outside, and its erapo ration assists in cooling the water in the pipe. lt ywill be observed thatI there are no rivets exposed to the inside of the fl'irnace. Should a stave develop a leak or crack, its water system is cut; ofi by closing valves 20 and 21.` The stave is drained through its plug 1Q and is filled with ganister mud,

either by disconnecting the upper manifold and intrmlucing the mud through the pipe socket, or it may be introduced through a special opening 32, Fig. i. Valve 2T is then opened and water sprayed over the Aface of channel 5 by the spray pipe QQ, and the .line of the furnace thus held. The front ol the slave inside the furnace then burns oil', and the ganist-er mud forms a protective lining.

l claim '1. A blast furnace cooling stare, comprising a trough-shaped member, a channel member united to the trough-shaped member between its sides, end plates cmmeeted to the channel and trough-shaped members and means to cause a circulation of water through the stave.

A. blast furnace cooling stave, compris ing a trough-shaped member, a member extending across Vthe trough, end members closing the ends of the chambers formed by tbc two members, and means to produce a circulation of cooling water tlirough the stave. l

3. A blast, furnace. cooling device comprising a hollow stave and a circulating and radiating system connected to the stave to cause circulation through the system and stave.

Lt. A blast furnace cooling device, comprising a hollow stave. a circulating and radiating pipe system connected to the stave and having an overflow above the stave, andmeans to injecty water into the lower part of said system to assist the circulation of water in the system and stave.

A blast furnace cooling device, comv prising a hollow stave, a water circulating and radiating pipe system connected to the sta ve, valves to disconnect the system from its stave, and a water spraying pipe connected to the system arranged to deliver a water spray to the outer surface of the stare near its top, l l

t. The combination with a blast furnace, of hollow \\f'at3er- .:ooled staves, furnace shell members connected to and between adjacent staves, a bustle water supply pipe, a radiat ing and circulating system connected to each stave and having connection with said bustle pipe.

7. The combination with the mantle of a blast furnace, of hollow, water-cooled stares supported by said mantle, channelsshaped' shell members between and vconnected to adjacent stares, fire brick lining between the stares, a water bustle pipe, a circulatin g and radiating water system connected to each stave and the bustle pipe, and means to maintain a pressure on the water in said system.

8. A hollow water-cooled stave comprising trough-shaped members whose walls eX- posed to the charge of the furnace are thickcned, a channel member connected between the sides oi' bhe trough-shaped member, the edges of said trough-shaped member projecting beyond the enges of the ehannel member, and a furnace shell member secured to said projecting sides of the troughshaped member and means closing the ends of the sieve.

9. A hollow Water-Cooled stave comprising a trough member thickened at its longitudinal center, a channel Connected to and between the sides of the member, means for closing Jche ends of the stave so foi-med, an

upper manifold, a lower manifold, radiator pipes connected. between the manifolds and means to supply Water to 'the lower nieni- 15 fold* In testimony hat l Claim the foregoing as my invention, I have signed my .neme in presence or two subscribing Witnesses.

FRANK D. CARNEY.

Witnesses Gmo. W. PARSONS CHARLES TURNER. 

